Improvement in building-blocks



N. Bonn.

Improvement in Building Blocks.

N0. 5,685. Patentedlune6,1871.

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NITED STATES NICHOLAS EDGE, OF NEW YORK, N. Y., ASSIGNOR TO HIMSELF AND W. J.

' MAIDHOF, OF SAME PLACE.

IMPROVEMENT IN BUILDING-BLOCKS.

Specification forming part of Letters Patent No. 115,685, dated June 6, 1871.

I To all whom it may concern:

Be it known that I, NIGHoLAs Boon, of the city, county, and State of New York, have invented a new and Improved Building-Block; and I do hereby declare that the following is a full, clear, and exact description of the same,

reference being had to the accompanying drawside having the full depth. In the middle of the block or thereabout I form an aperture D, to serve as a ventilating-flue. These blocks are more particularly adapted for use in constructing buildings with stone fronts and brick backing, but will be found, perhaps, equally serviceable under other circumstances.

Having thus described all that is necessary to a full understanding of my invention, what I esteem to be new, and desire to protect by Letters Patent, is-

As animproved article of manufacture, a rabbeted building-block, A B G, provided with the flue D, as and for the purpose specified,

NICHOLAS BOOH.

Witnesses:

W. J. MAroHoF, Gno. W. MABEE. 

